Electric welding-machine.



A. C. TAYLOR,

ELECTRIC WELDING MACHINE.

APPLICATION FILED iUNEZG, 1913.

l 1 96,6 1 3 Patented Aug. 29, 1916.

4 SHEETS-SHEET 1 A. c. TAYLOR.

ELECTRIC WELDING MACHINE.

APPLICATION FILED JUNE 26. HH'L Tug. 3

A. C. TAYLOR.

' ELECTRIC WELDING MACHINE.

APPLICATION FILED JUNE26. I913.

Iatouted Aug. 29, 1916.

4 SHEETSSHEET 4.

Tig. 7

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UIN'ITED STATES PATENT OFFICE.

ALBERTTS G. TAYLOR, F WARREN, OHIO, ASSIGNOR TO THE WINFIELL MANUFAC-TUBING COMPANY, OF WARREN, OHIO, A CORPORATION.

ELECTRIC WELDING-MACHINE.

To all whom it may concern Be it known that I, ALBERTIs C. TAYLOR,citizen of the United States, residing at Warren, in the county ofTrumbull and State of Uhio, have invented certain new and usefuiimprovements in Electric VVelding-Machines, of which the following is aspecification.

Thi invention relates to an electric welding machine, and the inventionconsists in the improved construction and combination of partssubstantially as shown and described and particularly pointed out in theclaims.

in the accompanying drawings, Figure 1 a perspective view of a completemachine embddying my improvements. Fig. 2 is a vertical sectional. Viewand elevation of the machine enlarged somewhat as compared with Fig. 1.Fig. 3 is a side elevation of the upper portion of the machine oppositethe s ide shown in Fig. Fig. is a cross section iooiring down on a linecorresponding siibstanti lly to H, Fig. 2. Fig. 5 is a front elevat on.of the machine sectioned y at its lo or right hand corner to dis secertain nternal parts hereinafter iuliy 6 is a perspective view of hornand its slidable sup- '2 and 8 are a pian and a spectiveiy of one formof an er adapted to be secured to (l is a perspective View of 1 Q.described. the lower a o 1 port, ans

the hoid shown in Figs. 7 and 8, and Fig. 1G is perspective view of astill further modified form of electrode holder which is c. apted to heneed interchangeably with the e; strode holders shown in Figs. 1 and 9.

The machine as thus shown belongs more especiaiiy to the spot weldingtype of electric weiders and comprises certain novel featuresconstruction making for convenience and efficiency of operation as willnow appear. Thus, [3. represents the hollow base or body of the machineand B a cap or top therefor having a forwardly projecting arm whichcarries a vertically movable holder C v a spot-welding eiectrode 2. Acorresponding electrode 5 is upheld below the first by supporting" meanscomprising a slide 4, "the bar or o, and any one of the hoidersSpecification of Letters Patent. Patented Aug, 29, 1916 Applicationfiled June 26, 1913.

Serial No. 775,890.

D, E or F. It will be noticed that the upper electrode is constructedand arranged to be raised and lowered within limits by its holder C andthe lower electrode 3 is adapted to occupy a fixed position in respectthereto by either of the holders D, E or F, see Figs. 1, 9 and 10, whendetachably secured to the bar or arm 5. These holders areinterchangeable to facilitate operations on different kinds of work andfor this reason bar 5, which is of solid copper and in one sense aterminal member for the transformer, is slotted at its end 6 to receiveand seat the T-shaped base 7 of the respective holders D, E and F.Locking of the holder is accomplished by a bolt 8 screwed into thebottom of the holder and seated upon a cross piece 9 as shown in Fig. 2,or by a combined bolt 8 and eccentric lever 10 as shown in Fig. 1. Thelatter construction is preferred as it provides for an adjustablesetting of the holder inward or outward as desired upon bar 5. This baror arm is removably-bolted to the slide, which is also made of solidcopper to serve as a conductor for the eiectric current, and the bodypart of this slide has a dovetailed channel at its rear slidably engagedwith the vertically disposed dove tailed guide member 11, which isbolted to the recessed front wali 12 of body B but also electricailyinsulated therefrom by suit able insulating material 13 interposedbetween the metai parts. Guide member 1 is a solid copper piece having ashort lateral extension 14 at its upper end (Fig. 2) to which thesecondary bands 15 of the transformer 16 are fastened. The other end 17of the secondary bands is secured to holder C.

Slide 4 is solidly secured at any elevation on guide member 11 by'abcvel-edged gib 18 and hand controlled screws 19 and nuts 19" at oneside. In order that the slide 4 and its parts maybe easily and readilyshifted and held at any desired elevation, a counterweight 20 isattached by chain 21 to the said slide, said chain running over a wheel22 located within the top B of the machine.

The upper holder C has a limited vertical adjustment or movementdownward obtained by a rack bar 23 and a pinion or gear mounted in head25. A hand lever 26 on the shaft of said pinion may be used to opcratethe same alone or said pinion can be indirectly operated by means of thefoot treadle 27 and a line of link and lever connections 28 extending toan arm 29 on the shaft of said pinion. A perfect control oi said upperholder in its relation to the work and to the lower holder and electrodeis possible by these means, and which control is further augmented bydefinitely limiting the movement of the holder C in greater or lessdegree, by means of a stepped stop arm 30 which is pivoted in the baseof body B on a rotatable shaft 81 and controlled by a hand lever 32 onthe outside of the casing. Lever 32 is adapted to adjustabl'y engage inor with any one of a series of segmentally disposed holes in an indexplate 33 secured to base A, Figs. 2 and 5. Que or another of the saidsteps can thus be brought over the end of treadle 27 to limit the upwardmovement of the said treadle and incidentally the relation of theelectrodes to each other, under the pull of the spring 34 which controlsthe upward movement of the said holder C by a chain 35 secured to thesmall end of a double pulley 36, and by a chain 37 to the large end ofsaid pulley. Means for cooling the electrodes or theirimmediatesupportscomprise flexible water pipe and hose connections 38 and 39 tothe said supports of the electrodes from a suitable source or supply, asmay be available.

Several important improvements are present in this machine over all theprior art familiar to me, and these include the vertically slidablesupport and electric-current conducting guide for the lower holder bymeans of which I am enabled to use interchangeable holders or supportsof varying elevation and form for the lower electrode according to thework to be done. For example, it" the bottom of a bucket were to bewelded the holders D or E would be used in lieu of holder F which isbetter adapted for flat superposed plates. it is important that all theparts involved should be good conductors of the electric current and beso constructed and arranged as to work with the least possibleresistance whether one form or another of holder be employed. Thisresult is obtained by the construction shown and in which the guide 11and slide a as well as the bar or arm 5 are of solid copper fastened inclose working relation. The counterbalance 20 makes the movement of saidslide and holder up and down easy and convenient and the hand screws 19tirough the bevel edged gib 18 fasten the slide upon the guide in closeworking relations as to both position and electric current.

Fig. 2 show a bracket 4:6 bolted the inside of body 1% and providedingle flange through which the regidator coil R- is secured by bolt 42to said bracket. The operating connection between hand lever 26 and foottreadle 27 is such that when the said lever is operated the treadle canbe automatically disconnected therewith and remain idle, the arm 29controlled by the treadle serving to efi'ect the disengagement of saidparts with each other. Both electrode holders have counter-balancingmeans, the upper holder being preferably by a spring supported upon topB instead of upon the operating parts, and the lower holderbeingpreterably by a weight on account of the distance it has to travel.

What I claim is:

1. In an electric welding machine, a fixed conducting guide memberhaving transformer connections directly attached thereto and a holderadjustably engaged thereon, a gib at one edge of said parts and handcontrolled screws engaged through said holder into said gib and adaptedto tighten the gib on said parts.

in an electric welding machine, a fixed conducting guide member and alower electrode holder of conducting material slidably adjustablethereon, in combination with a movable upper electrode holder and meansto adjustably fix a relative set position thereof in respect to the saidlower holder.

3. An electric welding machine having adjustable upper and lowerelectrode holders, means to adjustably fix the limit of movement of saidholders independently of each other, and counterbalancing means for bothof said holders.

4t. An electric welding machine having an upwardly movable. holder for aWelding electrode, and means to adjustably fin the limit of upwardmovement of said holder, in combination with means adapted to raise saidholder automatically to its adjusted limits.

5. An electric welding machine having an upper and a lower electrode, aholder for the lower electrode slidably mounted on a current-conductingsupport, means to fir said holder in adjusted position, and means tofacilitate the movement of said holder vertically on said support,

6. An electric welding machine having movable upper and lower electrodeholders, a lever and means to depress said upper holder, a treadle inthe bottom of the machine and operating connections therefrom to saidlever, and separate counter-balancing litt means for said holders.

1'. An electric welding machine having a lower electrode and a holdertherefor, and a conducting support on which said holder is slidablymounted, and transformer connec'tions secured said support, in combination with a counterweight for said holder.

8. An electric weldin machine having In testimony whereof I aifix mysignature an elfectrode holder emf agtu'ating means in presence of twowitnesses. there or comprisi a tree 1e and connections therefrom wigsaid holder adapted to ALBERTIS TAYLOR 5 depress the same, and agraduating stop to Witnesses:

engage the treadle and limit the return Jnssm G. G ms, movement thereofand the electrode holder. W. D. BYARD.

